All 68 Roadrunners were 383HP cars, no other option. Inland shifters were the shifter used up to a certain cutoff date, but I'm sure the specific date and that also changed from assembly plants and A&B body chassis.
One thing to note, Hurst shifted cars have a "REVERSE" light on the dash. Inland shifter cars do not have this due to a reverse lockout mechanism (and the reason they were so junky!).
Pistol grip = 1970
Just some added info!
Cheers
Dave